They have got only half of it... Without electric contacts the body of course does not know if you are turning focusing ring or not. However peaking can be engaged via any of configurable buttons. Now the EVF shows peaking and when you press shutter button half way it disappers.

Hei Pekka, thanks! So, just to be sure, does this manual engagement of focus peaking also work with old manual lenses? (would be great if it does!)